public class test {
        public static void main(String[] args) {
            int a=10;
            int b=20;
            --a;
            System.out.println(a);
            a--;
            System.out.println(a);
            ++a;
            System.out.println(a);
            a++;
            System.out.println(a);
            int c=a+b;
            System.out.println(c);
            System.out.println(10/3);
            System.out.println(10/3.0);
            System.out.println(10%3);
            System.out.println(10%-3);
            System.out.println(-10%-3);
            System.out.println(-10%3);
            System.out.println(11.5%2);

        }
}
